Replaced YaspGrid by SGrid in problem files (authorized by Bernd).
This is done since YaspGrid currently does not always work properly for O3 compilations. Capitalized property names in spatialparams and problems according to property name convention. Beautified input files. Reviewed by Markus. git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@8812 2fb0f335-1f38-0410-981e-8018bf24f1b0